# AGENTS.md - Vessel routing measures (TSS, fairways, precautionary areas)

Guidance for AI agents and LLMs working with this collection.

## Overview

IMO-adopted and USCG vessel routing measures in U.S. waters (327 polygons by `routetype`: traffic lanes, separation zones, precautionary areas, fairways, areas to be avoided, two-way and recommended routes, particularly sensitive sea areas), with the `cfrsection` and `citation` that establish each. The id is the source OBJECTID.

Licence CC-PDDC; credit: National Oceanic and Atmospheric Administration (NOAA), Office for Coastal Management (OCM), via MarineCadastre.gov. Public domain. Processed by Ocean Metrics.

## Find a place

```sql
SELECT * FROM read_parquet('https://storage.oceanmetrics.io/gazetteer/noaa_vessel_routing_measures/places.parquet')
WHERE name ILIKE '%california%';
```

`place_id` is unique and prefixed; `status` / `status_source` / `status_date` say whether the place is current and
where that is documented. Check `status` before treating a lease or area as live.

## Render on a map

Load `places.pmtiles` (layer `noaa_vessel_routing_measures`) into MapLibre GL via the PMTiles protocol; `styles/default.json` is a starting style.